Ellie and three of her friends each bought two hamburgers and a drink at the soccer game. If the drink cost $1.25 and the total cost for all four girls was $18.20, what was the cost of a hamburger?

$1.65 for a burger

explanation: you have to multiply 1.25 with 4 for the drink which is 5 dollars they spent. subtract the total amount( 18.20) with the 5 dollars giving you 13.2. divide 13.2 with how many burgers they got. it says they each bought two so 4 times 2. so they got 8 burgers together. ( 13.2\ 8 = 1.65)

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable